dp = [[False for _ in range(3)] for _ in range(5)]
print(dp)

tt = [[-1, 0, 1], [-1, 2, -1], [0, 1, -1], [-1, -1, 2]]
for i in tt:
    i.sort()
print(tt)
t = [i for i in tt]
print(t)
a = [''for _ in range(3)]
print(a)